Thinkpad supervisor password read /clear

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I spent hours on this but couldn't get anything useful from IBMpass. I later found a much simpler process described in a YouTube video: How to unlock BIOS Supervisor Password from Lenovo Thinkpad Laptop (no damage to laptop) - YouTube

Basically the steps are.

  1. Power on the laptop and short SDA and SCL as soon as you see the logo. Keep them shorted.
  2. The BIOS will think the EEPROM is corrupt and allow you supervisor acces to the BIOS settings.
  3. From here the video recommends to change the password. Enter the new password then confirm but before pressing enter release the shorted pins.
  4. Next I dissabled the password, saved changes and restarted to check.

Hope this helps someone.